Tra từ behind - Từ điển Oxford Advanced Learner 8th

be·hind preposition, adverb, noun BrE [bɪˈhaɪnd] NAmE [bɪˈhaɪnd]
preposition
1. at or towards the back of sb/sth, and often hidden by it or them
• Who's the girl standing behind Jan?
• Stay close behind me.
•a small street behind the station
•She glanced behind her.
•Don't forget to lock the door behind you (= when you leave).
•The sun disappeared behind the clouds.
compare ↑in front of
2. making less progress than sb/sth
• He's behind the rest of the class in reading.
• We're behind schedule (= late).
3. giving support to or approval of sb/sth
• She knew that, whatever she decided, her family was right behind her.
4. responsible for starting or developing sth
• What's behind that happy smile (= what is causing it)?
•He was the man behind the plan to build a new hospital.
5. used to say that sth is in sb's past
•The accident is behind you now, so try to forget it.
•She has ten years' useful experience behind her.

Word Origin:
Old English behindan, bihindan, from bi ‘by’ + hindan ‘from behind’.

Which Word?:
at the back / at the rear / behind
At the back and at the rear have a similar meaning, but at the rear is used more in formal or official language: ▪ What’s that at the back of the fridge? ◇ ▪ Smoking is only allowed at the rear of the aircraft. It is more usual to talk about the back door of a house but the rear exit of an aircraft or public building. If something is behind something else it is near to the back of it but not part of it. Compare: ▪ Our room was at the back of the hotel and ▪ There’s a lovely wood just behind our hotel.

adverb
1. at or towards the back of sb/sth; further back
• She rode off down the road with the dog running behind.
• The others are a long way behind.
•He was shot from behind as he ran away.
•I had fallen so far behind that it seemed pointless trying to catch up.
2. in the place where sb/sth is or was
• I was told to stay behind after school (= remain in school).
• This bag was left behind after the class.
3. late in paying money or completing work
•~ (with sth) She's fallen behind with the payments.
•~ (in sth) He was terribly behind in his work.

Word Origin:
Old English behindan, bihindan, from bi ‘by’ + hindan ‘from behind’.

noun (informal)
a person's bottom. People often say ‘behind ’ to avoid saying ‘bottom ’.
Syn: ↑backside
• The dog bit him on his behind.

Word Origin:
[behind] Old English behindan, bihindan, from bi ‘by’ + hindan ‘from behind’.